In the first place, for the less advanced, virt-install that I attempt to use below, is part of an incomplete deployment of virt-manager package in my Gentoo machine (incomplete because my system in a no-systemd and also no-dbus system, and some functionality, most motable the GUI, does not get installed).

( and I may try later with the latest kernel --why that old kernel can be read in this bug:=sys-kernel/hardened-sources-4.7.6: Kernel panic when starting KVM guestshttps://bugs.gentoo.org/show_bug.cgi?id=597554)So CONFIG_GRKERNSEC_PROC_GID=10 having been like this:# cat /etc/group | grep -E '\<10\>'

All those needed to be set for learning to get to that step with the still unsuccessful virt-install command run...

Here's those for completeness (the glxgears and the glxinfo are not of the bunch, removing them; NOTE: I set those PAX_<...> lines out of desparation they're probably superfluous and useless if not wrong... Esp. since --I revised my understanding by re-reading the grsecurity kernel help these is no SEGMEXEC in AMD64 kernels... ):